If there?s not a new collective-bargaining agreement between the NFL and its players? union, the Packers will have only five unrestricted free agents going into the offseason. They also have player-development potential, considering they were the youngest team in the NFL for the fourth straight season. But in his season wrap-up press conference Wednesday, coach Mike McCarthy referred several times to the theme of change as necessary for growing a team in the NFL. He even refused to rule out making any changes on his coaching staff a year after his overhaul on defense helped the team rebound to an 11-5 season and trip to the playoffs. ?You need to rebuild, reload, restructure,? McCarthy said. ?We have a good foundation. We have a program, a blueprint that works, but we need to improve it because we did not get past the first round (of the playoffs)."